The hpzstc04.exe process is a non-system file installed in the registry upon the installation of the HP Deskjet software suite. Since it is a registry resident process, any corruption in the program as a result of corruption or viral/malware infection would cause a user’s system to slow down, freeze or crash. Since it is a non-system process, it can be taken out of operation via the Microsoft System Configuration
How can I stop hpzstc04.exe and should I?
Most non-system processes that are running can be stopped because they are not involved in running your operating system. hpzstc04.exe. is used by HP Deskjet, If you shut down hpzstc04.exe, it will likely start again at a later time either after you restart your computer or after an application start. To stop hpzstc04.exe, permanently you need to uninstall the application that runs this process which in this case is HP Deskjet, from your system.
After uninstalling applications it is a good idea to scan you Windows registry for any left over traces of applications. Registry Reviver by ReviverSoft is a great tool for doing this.
Is this a virus or other security concern?
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What is a process and how do they affect my computer?
A process usually a part of an installed application such as HP Deskjet, or your operating system that is responsible for running in functions of that application. Some application require that they have processes running all the time so they can do things such as check for updates or notify you when you get an instant message. Some poorly written applications have many processes that run that may not be required and take up valuable processing power within your computer.
Is hpzstc04.exe known to be bad for my computer's performance?
We have not received any complaint about this process having higher than normal impact on PC performance. If you have had bad experiences with it please let us know in a comment below and we will investigate it further.
What can I do if hpzstc04.exe is causing errors on my computer?
The first thing you should do if hpzstc04.exe. is causing errors on your computer is to run a Windows registry scan with Registry Reviver If you are still seeing errors after this you should uninstall the program that hpzstc04.exe, belongs to, in this case HP Deskjet